Marquesses | Titles by Rank
- Marquesses of Mentana
- Marquesses of Menzago e Vinago
- Marquesses of Merito
- Marquesses of Méritos
- Marquesses of Merode-Batenburg
- Marquesses of Merry del Val
- Marquesses of Mesa de Asta
- Marquesses of Mesnilglaise
- Marquesses of Mesuraca
- Marquesses of Meximieux
- Marquesses of Mézières
- Marquesses of Milford Haven
- Marquesses of Mimeure
- Marquesses of Minas
- Marquesses of Mirabal
- Marquesses of Mirabeau
- Marquesses of Mirabel
- Marquesses of Miraflores
- Marquesses of Mirallo
- Marquesses of Miramon
- Marquesses of Miramon-Pesteils
- Marquesses of Mirasol
- Marquesses of Miravalles
- Marquesses of Mirebeau
- Marquesses of Mirepoix
- Marquesses of Mirville
- Marquesses of Misuraca
- Marquesses of Mochales
- Marquesses of Moctezuma
- Marquesses of Mohernando
- Marquesses of Molembais
- Marquesses of Molina
- Marquesses of Molins
- Marquesses of Monasterio
- Marquesses of Moncrivello
- Marquesses of Mondéjar
- Marquesses of Mondicourt
- Marquesses of Mondonico
- Marquesses of Monfalim
- Marquesses of Monistrol de Noya
- Marquesses of Monreal
- Marquesses of Mont-Roig
- Marquesses of Montagu
- Marquesses of Montagu
- Marquesses of Montalban
- Marquesses of Montalegre
- Marquesses of Montalvão
- Marquesses of Montana
- Marquesses of Montanaro
- Marquesses of Montaos